CVE-2026-122304
Critical
Description
Kyverno from 1.17.0 before 1.19.2 contains an authorization bypass vulnerability that allows namespace admins to escape namespace confinement because the cleanup controller builds its context loader with a nil policy. Attackers can create a namespaced CleanupPolicy with apiCall or globalReference context entries to read cross-namespace Secrets and modify validatingwebhookconfigurations using the cleanup controller's ServiceAccount.
SeverityCritical
CVSS9.9
Exploit probability—
ProductKyverno
PublishedNov 5, 2026
First seenNov 5, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- kyverno kyverno1.19.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| kyverno kyverno | 1.17.0 ≤ v < 1.19.2 | 1.19.2 |
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